
%0 Journal Article
%A Gibberd, Mark R. 
%A Walker, Rob R. 
%A Condon, Anthony G. 
%T Whole-plant transpiration efficiency of Sultana grapevine grown under saline conditions is increased through the use of a Cl<emph type="7">&#8211;</emph>-excluding rootstock
%J Functional Plant Biology
%D 2003/06/24
%V 30
%N 6
%P 643-652
%K grapevine, photosynthesis, rootstock, salinity, transpiration efficiency, Vitis.
%R https://doi.org/10.1071/FP02191
%U https://www.publish.csiro.au/paper/FP02191 
%X The aim of this study was to test the influence of salinity (1, 20, 40 and 80 mol m&#8211;3) on the transpiration efficiency (W = biomass / water transpired), lamina gas exchange and carbon isotope discrimination (&#916;) of grapevine (Vitis vinifera L. cv. Sultana) grown on own roots or grafted to a Cl&#8211;-excluding rootstock (Ramsey; Vitis champini L.). Growth of own-rooted and Ramsey-rooted vines irrigated with a salinity of 40 mol m&#8211;3 was reduced by 55 and 12%, respectively, compared with vines irrigated with 1 mol m&#8211;3. At 1 mol m&#8211;3 W of Ramsey-rooted vines was 1.3-fold higher than own-rooted vines (3.9 and 3.0 g L&#8211;1, respectively). Salinity resulted in a decrease in W of own-rooted vines (31% reduction at both 40 and 80 mol m&#8211;3). In contrast, W of Ramsey-rooted vines increased by up to 1.25-fold under saline conditions. Consequently, at 80 mol m&#8211;3 W of Ramsey-rooted vines was 2-fold higher than own-rooted vines. To our knowledge this is the first demonstration of the potential of a rootstock to increase W of a crop species under saline conditions. The rootstock-dependent differences in grapevine W under saline conditions were not determined by differences in lamina gas exchange. Differences in W associated with rootstock may be attributed to differences in ion uptake and the energy requirements associated with ion partitioning and the formation of compatible solutes. 
